Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1983-04-04
1985-03-26
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
315DIG7, 361 45, 363 56, 363 97, H02H 316
Patent
active
045076987
ABSTRACT:
With most fluorescent lighting fixtures, the voltages required at the sockets to start the fluorescent lamps are so high as potentially to constitute a substantial electric shock hazard to persons having to service such fixtures. To mitigate this hazard, whenever socket voltages exceed certain levels, protective measures have to be provided.
The essential shock hazard problem associated with a fluorescent lighting fixture relates to the situation where a person, who may be in contact with earth ground, is holding onto one end of a fluorescent lamp while the other end of the lamp is inserted into its socket.
In its preferred embodiment, subject invention constitutes an electronic ballasting means for fluorescent lamps, with said ballasting means comprising an inverter operating at a frequency of about 33 kHz.
To mitigate the electric shock hazard associated with high ballast output voltages, arrangements have been provided by which just a small current flowing directly from one of the ballast output terminals to earth ground will operate to shut the inverter off.
REFERENCES:
patent: 3407337 (1968-10-01), Benham
patent: 3506906 (1970-04-01), Nestor
patent: 4398126 (1983-08-01), Zuchtriegel
LandOfFree
Inverter-type ballast with ground-fault protection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Inverter-type ballast with ground-fault protection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inverter-type ballast with ground-fault protection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1297091